Asexuality

International Asexuality Day

Waltzing Matilda

Waltzing Matilda Day (Australia)

Tartan Day

Tartan Day (United States & Canada)

National Beer Day (United States)

New Beer's Eve (United States)

Public holidays in Indonesia

National Fisherman Day (Indonesia)

International Day of Sport for Development and Peace

International Day of Sport for Development and Peace

April 6 (Eastern Orthodox liturgics)

Christian feast day:
April 6 (Eastern Orthodox liturgics)

Pope Sixtus I

Christian feast day:
Pope Sixtus I

Beatification

Christian feast day:
Blessed Pierina Morosini

Notker the Stammerer

Christian feast day:
Notker the Stammerer

Marcellinus of Carthage

Christian feast day:
Marcellinus of Carthage

Galla of Rome

Christian feast day:
Galla of Rome

Eutychius of Constantinople

Christian feast day:
Eutychius of Constantinople

Brychan

Christian feast day:
Brychan

Albrecht Dürer

Christian feast day:
Albrecht Dürer and Lucas Cranach (Lutheran Church).